7145729 has 8 divisors (see below), whose sum is σ = 7964640. Its totient is φ = 6371136.

The previous prime is 7145707. The next prime is 7145731. The reversal of 7145729 is 9275417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7145729 - 2⁸ = 7145473 is a prime.

It is a super-2 number, since 2×7145729² = 102122885882882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7145759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10739 + ... + 11384.

It is an arithmetic number, because the mean of its divisors is an integer number (995580).

Almost surely, 2^7145729 is an apocalyptic number.

It is an amenable number.

7145729 is a deficient number, since it is larger than the sum of its proper divisors (818911).

7145729 is a wasteful number, since it uses less digits than its factorization.

7145729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22159.

The product of its digits is 17640, while the sum is 35.

The square root of 7145729 is about 2673.1496404055. The cubic root of 7145729 is about 192.6114854297.

The spelling of 7145729 in words is "seven million, one hundred forty-five thousand, seven hundred twenty-nine".